gui: remove dead build flag TWRP_SIMULATE_ACTIONS

isn't used by the code, can be set via datamanager instead.

Change-Id: I3d98c85c91ce41f32de90345715f2f456f628419
diff --git a/gui/Android.mk b/gui/Android.mk
index 8ea4f3b..b8a8de8 100644
--- a/gui/Android.mk
+++ b/gui/Android.mk
@@ -36,12 +36,6 @@
 LOCAL_SHARED_LIBRARIES += libminuitwrp libc libstdc++ libminzip libaosprecovery
 LOCAL_MODULE := libguitwrp
 
-# Use this flag to create a build that simulates threaded actions like installing zips, backups, restores, and wipes for theme testing
-#TWRP_SIMULATE_ACTIONS := true
-ifeq ($(TWRP_SIMULATE_ACTIONS), true)
-LOCAL_CFLAGS += -D_SIMULATE_ACTIONS
-endif
-
 #TWRP_EVENT_LOGGING := true
 ifeq ($(TWRP_EVENT_LOGGING), true)
 LOCAL_CFLAGS += -D_EVENT_LOGGING